JPS6391850A - Information recording and reproducing device - Google Patents

Abstract

PURPOSE:To enable the reduction in the burden at a host side and quick recording, reproducing and erasing motions for information and to improve the efficiency by arranging a magnetic field generating means at a retreat position immediately by preparing for the loading of a recording medium in case of the recording medium not existing inside a device after the power source is supplied. CONSTITUTION:It is necessary for a control circuit 8 to perform the loading of a recording medium 4 in case of performing the recording, reproducing and/or erasing of information of the main work by the command of a host side in the case of no recording medium 4 existing in the device after the power source is supplied but when a magnetic field generating means is located at the set position or in its vicinity in such case, there is hazard of damaging the recording medium 4 with its contact in case of loading, so a retreat motion is performed for an adequate distance by rotating a driving motor 6 in the arrow mark (d) direction. When a switch S5 then detects the completion of the retreat, ordinary information recording, reproducing or erasing are carried out online by the command from the host side.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an information recording/reproducing device.

[Background of the Invention] In a magneto-optical information recording and reproducing device such as a magneto-optical disk device, a recording medium is externally moved to a position corresponding to an optical head that irradiates light for recording, reproducing or erasing information. Operations such as loading (loading) or moving the recording medium from the loading position to the outside and ejecting (ejecting) are performed, and when recording or erasing information, a magnetic field is generated from a predetermined position to a position close to and facing the recording medium. For example, an operation is performed in which the permanent magnet is moved (set) in one stage, and the magnetic field generating means is moved (evacuated) from the set position to the above-mentioned predetermined position at the end of recording or erasing.

By the way, conventionally, the above-mentioned magneto-optical information recording and reproducing apparatus has been equipped with the functions of recording, reproducing and/or erasing information, and also the loading and ejecting of the recording medium and the magnetic field generating means. Many had control means for all operations, such as set and retreat operations.

In recent years, however, magneto-optical information recording and reproducing bags that perform information recording, reproducing and/or erasing operations in accordance with control signals from the host have become increasingly desirable.

In this type of magneto-optical information recording and reproducing bag.

When the device receives a command from the host to record, reproduce, and/or erase information, it first detects whether the device is in sufficient 7G readiness to execute the command, and if the readiness is not sufficient, It is necessary to control each drive means to achieve sufficient posture. Examples of the sufficient posture include that the recording medium is at a predetermined loading position and that the magnetic field generating means is at a predetermined set position during recording and erasing. In the case where the above-mentioned preparation is insufficient, the driving means includes a driving means for moving the recording medium for loading and ejecting the recording medium, and a driving means for moving the magnetic field generating means in 7 steps for setting and retracting the magnetic field generating means. can give.

In particular, in magneto-optical information recording and reproducing devices, if the bias magnetic field generating means is at or near the set position when loading a recording medium from outside the device, there is a risk that the recording medium will collide with the magnetic field generating means and be damaged. Therefore, it is preferable to evacuate the magnetic field generating means prior to the loading operation of the recording medium.

If the operations associated with such recording, playback, and/or erasing are all controlled by commands from the host side,
The control of this incidental operation occupies a considerably large proportion of the control of the main operation of recording, reproducing, and/or erasing information, which increases the burden on the host side and reduces the efficiency of the main operation. .

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an information recording/reproducing apparatus that can record, reproduce, and/or erase information with good efficiency by efficiently executing associated operations.

[Summary of the Invention] According to the present invention, in order to achieve the above-mentioned objects, there is provided a means for setting a magnetic field generating means to a predetermined position for recording and/or erasing information, and a method for generating the magnetic field. The magnetic field generating means has a means for retracting the means from the set position, a means for detecting whether the magnetic field generating means is at the set position, and a means for detecting the presence of the information recording medium. Furthermore, after the power is turned on, it is detected whether or not the recording medium is in the device, and if it is not in the device, it is further detected whether or not the magnetic field generating means is in the retracted position, and if it is not in the retracted position, the retracting operation is performed. An information recording/reproducing apparatus is provided, characterized in that it has means for performing control such as to realize a completed state.

[Example] Hereinafter, specific examples of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of an information recording/reproducing apparatus according to the present invention. This embodiment is applied to a magneto-optical disk device.

In FIG. 1, 1 is a drive motor for rotating a recording medium, 2 is an optical head, and 3 is a permanent magnet serving as bias magnetic field generating means. 4 is a magneto-optical disk which is an information recording medium, and 5 is a magneto-optical disk which is an information recording medium; This is a drive motor that is a means for moving the machine by a distance of 8. A loading operation is performed by rotating the drive motor 5 in the direction of arrow a, and an ejecting operation is performed by rotating the drive motor 5 in the direction of arrow A. Further, 6 is a means for moving the bias magnetic field generating means 3 between the illustrated retracted position (D) and the set position (C) facing the optical radar 2 (CD I+++ illustrated). It is a barrel drive motor. A setting operation is executed by rotating the drive motor 6 in the direction of arrow C, and a retracting operation is executed by rotating the drive motor 6 in the direction of arrow d.

In FIG. 1, Sl is a switch for detecting the presence of a recording medium I in the apparatus.

S2 is a switch for detecting that loading of the recording medium 1 is completed, and S3 is a switch for detecting that ejection of the recording medium 1 is completed.

S4 is a switch for detecting that setting of the magnetic field generating means 3 is completed, and S5 is a switch for detecting that retraction of the magnetic field generating means 3 is completed. Further, the drive motor 1 is provided with an encoder 7 for detecting its rotation speed.

In FIG. 1, 8 is a control circuit. The control circuit is a so-called CPU, and the control circuit includes the switch 5t.
-35 and the encoder 7 are input, and the control circuit 8 outputs control signals for the drive motors 1, 5.6. Further, the control circuit 8 outputs control signals to the optical disc 2, that is, signals for controlling the operation of recording, reproducing and/or erasing information, and controlling other operations such as tracking control and focusing control. Further, a tracking error detection signal, a focusing error detection signal, and a recording information signal for tracking control and focusing control are input from the optical head 2 to the control circuit 8. The control circuit 8 is connected to the host side, and the main operations of recording, reproducing, and/or erasing information are executed only by commands from the host side.

Next, the operation of the apparatus of this embodiment will be explained in detail.

FIG. 2 is a flow diagram for explaining the operation of the control circuit 8 of the apparatus of the above embodiment.

The control circuit 8 starts operating at the same time as the power is turned on (START
)do.

First, the RAM and I10 port in the control circuit are initialized (step 21).

Next, the number of revolutions of the drive motor 1 is measured based on the signal from the encoder 7 (Step 22), and it is determined whether the number of revolutions is less than a set value, for example, IHz (Step 23).
), if it is not below IHz, the process returns to step 22.

That is, if the rotation speed is below IHz, it is assumed that the drive motor 1 has substantially stopped and the next operation is executed, but if the rotation speed is not below IHz, the drive motor 1 is stopped first. After that, perform the following actions: This results in
Damage to the recording medium caused by loading the recording medium into the rotating drive motor 1 or ejecting the recording medium from the rotating drive motor 1 is prevented. Incidentally, as long as such a purpose is achieved, the rotation speed setting value may be any desired value other than 1Hz.

If it is determined in step 23 that the rotational speed is below IHz, it is determined whether or not the recording medium 4 is present in the apparatus based on the detection signal from the switch S1 (step 24).

If it is determined in step 24 that the recording medium 4 exists, then a signal from the host side is detected and it is determined whether the information recording/reproducing apparatus is instructed (step 25).

If it is determined in step 25 that the information recording/reproducing device is instructed, the drive motor 5 is rotated in the direction of arrow a to perform a loading operation for an appropriate distance (step 2
6) After that, it is determined whether or not loading is completed based on the detection signal from the switch S2 (step 27).
), if the loading is not completed and ``1'' is added, the process returns to step 26.

On the other hand, if it is determined in step 25 that the information recording/reproducing device is not instructed, the drive motor 5 is rotated in the direction of the arrow to perform an appropriate distance ejection operation (step 28), and then - is recorded. It is determined whether the ejection is completed based on the detection signal from the switch S3 (step 29), and if it is determined that the ejection is not completed, the process returns to step 28.

Through the above steps 25 to 29, if the information recording/reproducing device is instructed by the host side, the loading of the recording medium is completed in advance; on the other hand, if the information recording/reproducing device is not instructed by the host side In this case, ejection of the recording medium can be completed in advance.

On the other hand, if it is determined in step 24 that the recording medium 4 does not exist, then it is determined whether or not the evacuation of the magnetic field generating means 3 is completed based on the detection signal of the switch S5 (step 30). If it is determined that the evacuation has not been completed, the drive motor 6 is rotated in the direction of the arrow d to perform an evacuation operation by an appropriate distance of 111iU (step 31).
), then it is determined whether the evacuation is completed based on the detection signal from the switch S5 (step 32), and if it is determined that the evacuation is not completed, step 3
Return to 1. That is, when there is no recording medium in the device, it is necessary to load the recording medium first when performing the main operation of recording, reproducing, and/or erasing information according to a command from the host (ill). However, if the magnetic field generating means 3 is present at or near the set position at that time, there is a risk that the recording medium will contact and be damaged during loading, so the evacuation of the magnetic field generating means 3 is completed in advance. be.

If it is determined in step 27 that loading has been completed and 11 is added, or if it is determined that ejection is completed in step 29.

If it is determined in step 30 that the evacuation of the magnetic field generating means 3 has been completed, and if it is determined in step 32 that the evacuation of the magnetic field generating means 3 has been completed, both In response to the command, a normal sequence control routine for recording, reproducing, or erasing information is executed online (step 33).

In the above embodiments, the case where the magneto-optical information recording and reproducing device is a magneto-optical disk device is exemplified, but the present invention is applicable to magneto-optical devices other than the above-mentioned embodiments, including cases where the recording medium is in the form of a so-called card. This rotation is similarly applied to information recording and reproducing devices.

[Effects of the Invention] According to the present invention as described above, in an information recording/reproducing device, if a recording medium is not present in the device after power is turned on, the magnetic field generating means is immediately moved to the retracted position in preparation for loading the recording medium. You can take the optimal posture by deploying the
There is no risk of damaging the recording medium during loading.

The burden on the host side is reduced, and the main operation of recording, reproducing, or erasing information can be quickly shifted to, and efficiency is significantly improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an information recording/reproducing apparatus according to the present invention. FIG. 2 is a flow diagram for explaining the operation of the control circuit of the information recording/reproducing apparatus according to the present invention. 1.5, 6: Drive motor, 2: Optical head, 3: Magnetic field generating means, 4: Information recording medium. 7: Encoder, 5l-35: Switch. Agent Patent Attorney Johei Yamashita Figure 2

Claims (2)

[Claims] (1) means for setting the magnetic field generating means to a predetermined position for recording and/or erasing information, and means for retracting the magnetic field generating means from the set position;
It has a means for detecting whether the magnetic field generating means is at the set position and a means for detecting the presence of an information recording medium, and a means for detecting whether the recording medium is in the apparatus after power is turned on. If the magnetic field generating means is not in the apparatus, the magnetic field generating means is further provided with means for performing control such as to detect whether or not the magnetic field generating means is in the retracted position, and to realize a state in which the retracting operation is completed if the magnetic field generating means is not in the retracted position. An information recording and reproducing device characterized by: (2) The control means determines whether the recording medium is in the apparatus after the movement of the recording medium driving means falls within a predetermined range based on the detection result of whether the recording medium driving means is moving after the power is turned on. The information recording/reproducing device according to claim 1, wherein the information recording/reproducing device is configured to detect whether